As long as there is some 5E content published doesn't retread too much of the same territory of AiME (for example, doing region guides for places already covered in detail), I'm excited for whatever they come out with. I imagine, however, that this may not be the case. I see that TOR2E will begin with a retread of Eriador, so I suppose we can expect AiME's successor to stay in the same zone as well. Hopefully they are able to flesh out the area, at least, in a way that builds upon the original guides.
My impression is that we are not going to get a simple retread of the
Rivendell supplement in the new core rules for TOR, but they will cover Eriador in greater scope and detail , possibly including the regions of the Blue Mountains, Grey Havens and Lindon. I think the maps of Eriador from
Journeys & Maps will better represent the area that will be covered. We also know now that the TOR starter set will include a supplement on the Shire.